package com.songtai.util;

import java.util.regex.Pattern;

/**
 * @author zzy
 * @catagory 
 */
public class StringUtil {
	  /** 
	     * @param str : 
	     *            source string 
	     * @param width : 
	     *            string's byte width 
	     * @param ellipsis : 
	     *            a string added to abbreviate string bottom 
	     * @return String Object 
	     *  
	     */  
	    public static String abbreviate(String str, int width, String ellipsis) {  
	        if (str == null || "".equals(str)) {  
	            return "";  
	        }  
	  
	        int d = 0; // byte length  
	        int n = 0; // char length  
	        for (; n < str.length(); n++) {  
	            d = (int) str.charAt(n) > 256 ? d + 2 : d + 1;  
	            if (d > width) {  
	                break;  
	            }  
	        }  
	  
	        if (d > width) {  
	            n = n - ellipsis.length() / 2;  
	            return str.substring(0, n > 0 ? n : 0) + ellipsis;  
	        }  
	  
	        return str = str.substring(0, n);  
	    }  
	  
	    /** 
	     * @param str : 
	     *            source string 
	     * @param width : 
	     *            string's byte width 
	     * @param ellipsis : 
	     *            a string added to abbreviate string bottom 
	     * @return String Object 
	     *  
	     */  
	    public static String Html2Text(String inputString) {  
	        String htmlStr = inputString; // 含html标签的字符串  
	        String textStr = "";  
	        java.util.regex.Pattern p_script;  
	        java.util.regex.Matcher m_script;  
	        java.util.regex.Pattern p_style;  
	        java.util.regex.Matcher m_style;  
	        java.util.regex.Pattern p_html;  
	        java.util.regex.Matcher m_html;  
	  
	        java.util.regex.Pattern p_html1;  
	        java.util.regex.Matcher m_html1;  
	  
	        try {  
	            String regEx_script = "<[\\s]*?script[^>]*?>[\\s\\S]*?<[\\s]*?\\/[\\s]*?script[\\s]*?>"; // 定义script的正则表达式{或<script[^>]*?>[\\s\\S]*?<\\/script>  
	            // }  
	            String regEx_style = "<[\\s]*?style[^>]*?>[\\s\\S]*?<[\\s]*?\\/[\\s]*?style[\\s]*?>"; // 定义style的正则表达式{或<style[^>]*?>[\\s\\S]*?<\\/style>  
	            // }  
	            String regEx_html = "<[^>]+>"; // 定义HTML标签的正则表达式  
	            String regEx_html1 = "<[^>]+";  
	            p_script = Pattern.compile(regEx_script, Pattern.CASE_INSENSITIVE);  
	            m_script = p_script.matcher(htmlStr);  
	            htmlStr = m_script.replaceAll(""); // 过滤script标签  
	  
	            p_style = Pattern.compile(regEx_style, Pattern.CASE_INSENSITIVE);  
	            m_style = p_style.matcher(htmlStr);  
	            htmlStr = m_style.replaceAll(""); // 过滤style标签  
	  
	            p_html = Pattern.compile(regEx_html, Pattern.CASE_INSENSITIVE);  
	            m_html = p_html.matcher(htmlStr);  
	            htmlStr = m_html.replaceAll(""); // 过滤html标签  
	  
	            p_html1 = Pattern.compile(regEx_html1, Pattern.CASE_INSENSITIVE);  
	            m_html1 = p_html1.matcher(htmlStr);  
	            htmlStr = m_html1.replaceAll(""); // 过滤html标签  
	  
	            textStr = htmlStr;  
	  
	        } catch (Exception e) {  
	            System.err.println("Html2Text: " + e.getMessage());  
	        }  
	  
	        return textStr;// 返回文本字符串  
	    }  
}
